Means for checking the speed of doors



W. B. GERVAIS.

MEANS FOR CHECKING THE SPEED OF DOORS.

APPLICATION. FILED JAN-24.1914.

1,1 94,991. Patented Aug. 15, 1916.

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W. B. GERVAIS. =MEAN FOR CHECKING THE SPEED OF DOORS.

APPLICATION FILED JAN-24.1914.

Patented Aug. 15, 1916.

2 SHEETS-SHEET 2.

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balanced door immediately before' both] UNITED STATES: PATENT-OFFICE.

wAINwnIeH'r B. enrtvars, or cnIcllGo, IL moIs, AssI'GNon TO VARIETY immune TUBING comrm, or CHICAGO, ILLINOIS, a conronarrou or ILLINQIS.

. MEANS non cnncxme'rnn srnnn or noonsf Application filed January 24,1914. Serial Ito. 814,081.

To all whom it may concern:

and State of Illinois, have inventeda certain new and useful Improvement in Means for Checking the Speed of Doors, of-which the following is a full, clear, concise, 'and exact description, reference being had to the accompanying drawings, forming a part ofvthis specification.

My invention relates to doors and, more particularly, to means for checking the speed of doors, such as counterbalanced doors, etc., when such doors are being closed.

It has been found in practice that doors of that type, when being closed, come together with considerable of an impact, and'my invention is designed to obviate this undesirable feature. I

My invention contemplates a spring or other yielding device positionedso as to engage the lower panel or section of a counterpanels are brought together and, thus, ma-

terially decreasing the speed thereof, so that i the panels will come together without causg ing undue noise. I

My invention will be better understood by reference to the accompanying drawings, in which- Figure 1 is an elevational'view of a'coun terbalanced door showing the embodiment.

of my invention in conjunction therewith;

Fig. 2 is an enlarged view of my invention" showing the relative positions of the parts after the panels of the door have been brought together or closed; and Fig. '3 is a cross-sectional view taken qn line 33of Fig. 2. v

At the outset it might be well to describe briefly one type of door to which my inven tion is particularly adapted and, to this end, I have shown in Fig. 1 an upper panel' and a lower panel 5 of a counterbalanced door, these panels being either wholly of metal or they may be of wood and metal. They are connected by means of chains 5' and 6 secured to the panel 4 at points 7 and' 8, respectively, and pass over pulleys 9 and 10, suitably mounted to the frame work secured to the building, the other ends of these chains being secured to rods 11 and 12 having connections at points 13 and 1 1 to the panel 5. The latching arrange- I springs and j ment for the door comprises a disk 15, to'

Be it known that I, WAINWRIGHT B. GER- 3 vA1s,a citizen of the United States, and a resident of Chicago, in the county ofCook which is secured a handle 16,=this disk bemg ivotedf upon 0 a suitable, plate member or p ate 17' secured to the section 5. The

f disk 15 has pivoted thereto arms18- and 19, the outerends of which are arranged to engage withvthe projections 20 a1id21 secured to the" frameworkwhichis mounted on the bu lding. A spring 22 maintains the handle normally against the 'an'gle23 and 7 also maintains the arms 18 and 19 in their outermost positions. When the panels are brought together, thearms are-snappedinto place over the projections 20 and 21 and,

when it is desired to open the door',the handle 16 s rotated so as to disengage the arms and thus permit the panels to be separated,

or toop'en the door. As has before been stated, it frequently happens that when the panels are brought together, they come together with a considerable impact, thus causing a great deal of noise and also makone who is closing the door. My inventioncompr ses a mechanism for slackening the .1ng it in some cases very dangerous for the speed .of-the panels as they are brought together and to this end I provide the lower panel 5 with projections 24 and 25, which may be securedto the panel in any suitable manner, and, upon the L-shaped members 26 and 027,; atQeach side of the doorway, are

provided springs 28 and 29 secured by means I of bolts'at their upper ends and being loose at their lower ends and engaged by bolts 30 and 31,*these bolts being for the purpose of forcing the springs either out or in so as to secure'the desired friction between the the cooperating projections '24 and25.

; As shown inFig. 2-, the lower panel 5 is in its uppermost position, that is to say, it

and-passed over the' springs 28 and 29 and, thus, the movement ofboth panels has been decreased so as toreduce the impact between 'the panels. The projections 24 and' 25, as

shown,jare rounded so'as to pass over the springs 28 and 29 'quite easily, both when panel 5 is raisedand when it is is in engagement with the upper panel 4 and, during the upward course of the panel 5,, the projections :24 and 25 have engaged shown, inasmuch as it will be apparent that other means may be employed to effect the desired result of checking the speed of a the other end of which abuts against an adjusting screw threaded into said guide-way, and a lug projecting from the side edge of the door, said lug engaging and passing over said resilient member when the door is being raised or lowered.

2. In combination a vertically movable door, an angle bar secured to the vertical edge of said door,said angle bar having one leg projecting substantially in the plane of the door, a vertical stationary angle bar having one leg overlapping and lying substantially parallel to the leg of said first angle bar, said angle bars forming anopen channel between them, a projection secured to one of said angle bars and an adjustable bowed spring secured to said other angle bar, said parts having relative movement with respect to each other so that the spring and the projection will be engaged as the door moves toward the limit of its movement in closing to check the speed of movement thereof and will be disengaged when the door reaches the closed position.

In witness whereof, Ihereunto subscribe my name this 29th day of December, A. D.

WAINWRIGHT B. GERVAIS. Witnesses:

MmLARD GILMORE, F. E. KAHL. 

